Download zbxviewer.sh and put in /usr/lib/zabbix/alertscripts (can be viewed in the settings into zabbix_server.conf(cat zabbix_server.conf|grep AlertScriptsPath)) and add right on exec (chmod +x zbxviewer.sh)

On Your Zabbix server make new Media types with parameters as image

{ALERT.SENDTO} Then there will be your token

{ALERT.SUBJECT} Message subject

{ALERT.MESSAGE} Message your triggers

Set Attempts to 1

Go to the Users tab and add your parameters to your user as in the picture

Done!

Wait for the event to happen and you will receive notification in the application.